Concentrator.



No. 742,889.. PATENTED Nov. s, 1903. J. J. MONTGOMERY.

GONCBNTRATOR.

APPLIOATION I EILED JUNE 13| 1902' v 2 SHEETS-SHEET 1` 4 l a l NVf/VTH.

No. 742,889. PATENTED NOV. 3, 1903. J. J. MONTGOMERY. GONCENTRATOR.

APPLICATION FILED .TUNE 13, 1902.

NO MODEL. 2 SHEETS-SHEET 2.

UWM M wlmi WNW/55555.' /A/VE/v 47H 3o ples.

45 bed and table.

Patented November 3, 1903.

PATENT EETCE.

JOI-1N J. MONTGOMERY, OF SANTA CLARA, CALIFORNIA.

ooNoENTRAToR.

SPECIFICATION forming part of Letters Patent No. 742,889, dated November 3, 1903.

Application iiled June 13, 1902. Serial No. 111,462. (No model.)

ro concentrators in which separation by reason of difference in specific gravity of the particles iseifected by means of a shaking table.

My invention consists, essentially, in a concentrating-table having means for supplying I the material to one end thereof combined with means for imparting to said table a vibrating movement in the direction of the travel of the material thereon and means affecting the table to peculiarly modify or qualzo ify this movementand effect thereby the travel of the material toward the other end.

It also consists in the novel construction, arrangement, and combinations of parts, which I shall hereinafter fully describe and z 5 claim.

Referring to the accompanying drawings, Figure l is'a side view of a simple'form of my concentrator, showing the main features of my invention and illustrating its princi- Fig. 2 is a plan of my concentrator, showing its complete form, the screen f of the feeder being partially broken. Fig. 3 is a side elevation of same. Fig. 4 is an end View from the feeder end. Fig. 5 is a longitudinal vertical section-of the table B on 4o tical section of same.

Referring to Fig. l, A is a stationary bed. B is a concentrating-table. C C represent supporting-links pivoted to bed and table. D is a compensating-spring, also secured to E is a crank-shaft with connection e to the table, and F is a feeder adapted to supply the material to one end of the table. It will be seen that the supportinglinks C C are arranged at an inclination to 5o the surface of the table, and asin the arrangement shown the travel of the material on the table is to be from the feed end to the other end the links must be arranged at an angle against the direction of said travelthat is to say, an inclination toward the feed end of the table. It will be seen also that the spring D is arranged, as is shown by its inclination, to compensate for the downward pull of gravity on the table and to be at its maximum pressure when supporting the table at the lowest extremity of movement. When the table Bis carried by its links C C as thus inclined and is constrained by the spring D or other force in a manner to compensate for the downward pull of gravity, the vibratory movement of said table in the plane of the linkangles imparted to it by the crank-shaft E will under these conditions effect a travel of the particles upon it in the direction of the arrow-that is,.from the feed end to the other end. This is due to the gradually-accelerated combined up and forward movement of the table carrying the particles with it and the more pronouncedly accelerated start of the combined down and back movement, causing the table to slip from under the particles, thereby leaving them in their advanced position. The direction of these movements is due to the links C C being inclined to the table-surface at an angle against the travel of the particles thereon, while the acceleration of the movement and the difference therein between the up-and-down stroke are due to the spring D, arranged to compensate for gravity.

It will readily be seen from the foregoing that the rapidity of the travel of the particles upon the table is determined bythe angle to which the links C C are adjusted and the adjustment of the compensating-spring with respect toits pressure, said travel being slower if the adjustment of the links approaches the perpendicular and the adjustment ot' the spring be such as to minimize its pressure and being faster under opposite adjustments of links and spring. From this general law flow two further results, which must be noticed at this point. The first is that this travel of the particles on the surface of the table will take place even though the feed end be lower than IOO the other end, provided the adjustments of links and spring above noted be properly made, so that the particles under this in fluence will ascend an inclined plane even against a descending stream of water. The second is that in accordance with the statement that the rapidity of the travel of the particles is determined by these adjustments it follows that if the table besupported at its ends by links at different inclinations which give a diiferent angular movement then the velocity of translation will be different at the two ends. 30th these results find important application in practice, as I shall demonstrate in connection with mycomplete machine to be presently described, the first result-namely, the inclined table and the travel uphill-giv ing a more complete separation and an opportunity of better disposing of the worthless particles and the second result giving what may be termed a graduated separation at the most proper times and places, for by having a great angular movement at the feed end and a lesser inclination at the farther end the particles gradually1 decrease in the velocity of movementand nally come to rest. As a consequence of this the table-chan nels gradually fill up and the upper or worthless particles pass off in their discharges or are carried off by the washing of the water.

Speaking generally of the inclination of the supporting-links it may be stated that the algebraic sum of their angles must be an angle against the direction of movement ofthe particles and have a common influence on the whole concentrating-surface, by which I mean that whatever may be the inclination of any particular link or links with respect to the table the combined angles give the effect of an angle against the direction of the movement of the particles, and this expressionto wit, an angle against the direction of the travel of the material-I shall use as signifying such arrangement, whether all the links are so inclined or the sum of their angles is such as to give an angle against said movement. The best embodiment of these essential principles is illustrated in the remaining figures of the drawings.

A is the bed of any suitable character, here indicated, Fig. 3, as a receptacle to receive the discharge of the tailings from the concentrating-table.

B is the concentrating-table. It is supported at an inclination in the direction of its length, as shown in Fig. 3. Its supports may `be from above or, as here shown, from below.

These supports consist of links C and C', pivoted to the bed and to the table on each side. The pair of links C, which are near the lower end of the table, are inclined from the perpendicular, the inclination being toward the lower end of the table, Fig. 3. The pair of links C', which support the upper end of the table, may be similarly inclined to the lower pair of links, as in Fig. l, or they may be at a less inclination and even substantially. perpendicular, as shown in Fig.,3, providing the algebraic sum ofthe angles of all the links be,

as I have heretofore stated, an angle against the direct-ion of the travel of the material.

D represents springs secured below to the bed and above to the table. The position of these springs is, as here indicated, an inclined lone, the inclination being in the direction of the lower end of the table, so that they compensate for the downward pull of gravity and are at their-greatest pressure when the table is at its lowest point, Fig. 3. A supplementary spring D' may also be used at the end of the bed A, Figs. 2 and 3. This springis connected with the table by a rod d', and its pressure may be adjusted by the nuts d2. Said spring is likewise arranged to be at its maximum pressure when the table is at its lowest point, as indicated in Fig. 3.

F is the feeder for supplying the material. This consists of a suitably-perforated plate having a sifting-screen f over it. The feeder is carried by arms f', which at their outer ends are connected by pivoted links]e2 with standards a, rising from the bed A, their inner ends being connected by a loose joint at f3 with the table B, so that the feeder partakes of the reciprocating motion which is to be imparted to the table, as I will presently describe. It will be seen that the feeder is so located as to supply the material to the lower end of the inclined concentrating-table B, and it will also be seen that the supporting-links f2 are arranged at an angle on the other side of the perpendicular to that at which the supporting-links C C of the table are arranged-fthat is to say, the links f2 incline toward the upper end of the table, Fig. 3.

A reciprocating motion is imparted to the table in the direction of the travel of the material thereon, which in the present construction is the direction of the length of the table. This motion may be imparted by any suitable mechanism, and for the sake of illustration I have here shown a crank-shaft E and connecting-rod e.

When the machine is used with water, I have a pipe G, supplied with water from any suitable source. -I have here indicated a centrifugal pump g, which may be supposed to take the water from the bed A. The water is supplied to the table at proper points. I have here shown it as supplying it from the pipe G, which is suitably perforated, along one side of the table and from a branch g along the upper end of the table, the delivery being preferably made upon intervening screens H to break up the force of and to better distribute the water.

The surface of the table B may be of any suitable character, either plain or broken by rifties, barriers, or other obstructions, such as indicated by blo in Fig. 2. I have here shown it in its best form as composed of a plurality of parallel lengthwise channels or IOO troughs'b, having border ridges b and shallow grooves b2 adjacent thereto, Figs. 2 G. In the ridges b, which are themselves grooved, as seen in Figs. 5 and G, are made throughout their length at various points discharge-apertures b3 through their bottoms for the tailings, Figs. 2 and 5. At the upper ends of the channel-grooves Z22 are made discharges b4 for the concentrates, which are received in a suitable chute b5, located under the table and which is adapted to suitably dispose of then1,while the tailings fall through apertures b3 into the bed A, from which they may be in suitable manner removed. The whole surface of the table may becontinuous; but it is best provided at its lower end With inclined planes h6, Fig. 5, with low divisions DT to better distribute the material from an overlying apertured directing-plate 198 into the side of the channels Z) opposite their grooves b2. The table at its upper end is provided withinclined planes b9, Fig. 5, which serve the purpose of preventing the concentrates from banking up and washing over past their discharges b1 and also to better direct the water which is supplied from the head of the table. Extending from the waterpipe G over the feeder-screen f is a series of water-pipe branches g2, which serve the double purpose of supplying water to assist in the feed of the material and as a screen to better sift the material as it is delivered upon said pipes. Across the table above its surface are the inclined wires J, which serve as agitators to whip up and keep light the material as it travels up the table.

The operation of the machine is as follows: The table reciprocates or vibrates in the direction of its length, and as said table is sunported by links which are inclined as described and as the table is affected by the springs adjusted as described the travel of the particles upon the principlesI have stated will be up the incline toward the upper end of the table. During this travel the heavier particles will move faster and farther and sink lower than the lighter particles and will therebyeffectaseparation. Duringthecourse of travel the lighter particles or tailings will continually pass o from the top of the mass through the discharges b3, while the heavier particles will pass into and travel along in the channel-grooves b2 and continually move upward to their discharges b4. The speed of travel and the regulation of this speed at the proper points, as before mentioned, are secured by the proper adjustment of the links C C and springs D, so that the separation is gradual, being more pronounced at the feed end, and opportunity is afforded to dispose of the tailings accordingto the necessity of the operation. The travel of the material is gradually retarded as it approaches the upper end of the table, and the concentratesar'e stopped at the point desired. The object of and' mounting the feeder F in the manner'describedthat is to say, with its supportinglinks arranged at an opposite inclinauon to the links C C' of the table-is to cause in the" Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a concentrator, the combination of a concentrating-table, means for vibratin g said table in the direction of the travel of the material thereon, means for supplying the material to one end of said table, supports for said tableinclined to its surface at an angle against the direction of the travel of the material thereon, a spring to compensate the downward pull of gravity on the table, discharges for the tailings through the table at points throughout its length, and discharges for the concentrates at the end of the table opposite to that at which the material is supplied.

2. In a concentrator, the combination of a concentrating-table, means for vibrating said table in the direction of the travel ofthe material thereon, means for supplying the material to one end of said table, supports for said table inclined to its surface at an angle against the directionof the travel of the material thereon, a spring to compensate the downward pull of gravity on the table, a plurality of parallel .channels on the table extending in the direction of the travel of the material, said channels having discharges at intervals disposed beside their sides for the tailings, and having discharges for the concentrates at their ends opposite to that at which the material is supplied.

3. In a concentrator, the combination of a concentrating-table, means for vibrating said table in the direction of the travel of the material thereon, supports for the table inclined to its surface at an angle against the direction of the travel of the material thereon, a spring to compensate the downward pull of gravity on the table, a feeder to supply the material to'one end of the table, said feeder having its rear edge projecting beyond said table end and being connected with and deriving a vibrating movement from the table, and links pivotally supporting said feeder and arranged at an angle on the other side of the perpendicular to that at which the supports of the table are arranged, whereby the debris from the feeder is carried over its proj ecting rear edge and discharged over the end of the table.

4:. In a concentrator, the combination of an inclined concentratingtable, means for vibratin g said table in the direction of the travel of the material thereon, means for supplying IOO IIO

the material to the lower end of said table, In Witness whereof I have hereunto set my supports for said table inclined to its surface hand. at an angle against the direction of the travel of the material thereon, a spring to compen- JOHN J. MONTGOMERY. 5 sate for the downward pull of gravity on the table and a series of wires across and above Witnesses: the surface of the table disposed in the path WALTER F. VANE, 0f the material thereon. D. B. RICHARDS. 

